IBM Support

Last Man Standing

Technote (troubleshooting)


Problem(Abstract)

In order to wake a computer, at least one computer must be active in the target computer's subnet. To increase the likelihood that at least one computer in each subnet will be available to serve as a wake-up point.

Resolving the problem

Last Man Standing functionality

Last Man Standing computers are configured to ensure that they remain active and available to power-on other computers. When a computer is designated to be a Last Man Standing computer, it will be:

  • Excluded from TEM Power Management actions that would turn the computer off or actions that may change the computer's sleep state, such as the "Force Entry into Standby" Task, or Fixlets created by the Power Profile Wizard
  • Configured to not enter the system Standby, Hibernate, or hard-disk power management modes
  • Configured to serve as a Wake-on-LAN packet forwarder

Selecting Last Man Standing Computers

Operators using version 7.1 or greater of the TEM Console can configure a computer to be a Last Man Standing using the "Designate Last Man Standing" Task, which can be accessed from a link in the "On-Demand Wake-on-LAN" section of the Power Tracking Information Dashboard.

When the "BigFix Wake-on-LAN Analysis" is enabled, the "Designate Last Man Standing" Task will provide a table of Last Man Standing computers by subnet. This table is meant to help Operators identify "orphaned" subnets that do not currently have a Last Man Standing computer.


Master Operators will also be presented with a link to download additional TEM properties. These properties can be used to filter computers in the Take Action dialog, aiding in Last Man Standing selection.



We recommend that at least one computer in each subnet be designated a Last Man Standing computer. Note, however, that since Last Man Standing computers have system Standby disabled and are excluded from most Power Management actions, only a few should be selected from each subnet. Any computer running version 7.1 or greater of the TEM Client can become a Last Man Standing computer; however, the best practice is to select computers that tend to consistently remain active, such as servers or Relays.

Managing Last Man Standing Computers

While Last Man Standing computers are set to be excluded from Power Management actions that could hinder their ability to serve as wake-up points, custom actions taken outside of Power Management or outside of TEM could change their configuration. If this occurs, the "Improperly Configured Last Man Standing" Fixlet will become relevant. Run this fixlet to reconfigure broken Last Man Standing computers.

Note: Fixlets created with an outdated version of the Power Profile Wizard will not properly exclude Last Man Standing computers and may cause them to become improperly configured. The "Improperly Configured Last Man Standing" Fixlet will contain a list of all outdated Power Profile Fixlets. These Fixlets should be removed and recreated using the updated Power Profile Wizard.

The "Remove Last Man Standing" Task can be used to remove Last Man Standing exclusions from a computer. Once this Task is run, selected computers will be included in all power management actions, though, they will continue to function as Wake-on-LAN forwarders and their Standby Power Management settings will be left disabled until a new Power Profile is applied to them.

Related information

Wake-on-LAN packet forwarder

Historical Number

502

Document information

More support for: IBM BigFix family

Software version: BES 7.1

Operating system(s): Platform Independent

Reference #: 1506077

Modified date: 27 October 2011


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